Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 936 insertions, 0 deletions

diff --git a/drivers/net/arm/ether3.c b/drivers/net/arm/ether3.c
new file mode 100644
index 0000000..1cc53ab
--- /dev/null
+++ b/drivers/net/arm/ether3.c
@@ -0,0 +1,936 @@
+/*
+ *  linux/drivers/acorn/net/ether3.c
+ *
+ *  Copyright (C) 1995-2000 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card
+ *  for Acorn machines
+ *
+ * By Russell King, with some suggestions from borris@ant.co.uk
+ *
+ * Changelog:
+ * 1.04	RMK	29/02/1996	Won't pass packets that are from our ethernet
+ *				address up to the higher levels - they're
+ *				silently ignored.  I/F can now be put into
+ *				multicast mode.  Receiver routine optimised.
+ * 1.05	RMK	30/02/1996	Now claims interrupt at open when part of
+ *				the kernel rather than when a module.
+ * 1.06	RMK	02/03/1996	Various code cleanups
+ * 1.07	RMK	13/10/1996	Optimised interrupt routine and transmit
+ *				routines.
+ * 1.08	RMK	14/10/1996	Fixed problem with too many packets,
+ *				prevented the kernel message about dropped
+ *				packets appearing too many times a second.
+ *				Now does not disable all IRQs, only the IRQ
+ *				used by this card.
+ * 1.09	RMK	10/11/1996	Only enables TX irq when buffer space is low,
+ *				but we still service the TX queue if we get a
+ *				RX interrupt.
+ * 1.10	RMK	15/07/1997	Fixed autoprobing of NQ8004.
+ * 1.11	RMK	16/11/1997	Fixed autoprobing of NQ8005A.
+ * 1.12	RMK	31/12/1997	Removed reference to dev_tint for Linux 2.1.
+ *      RMK	27/06/1998	Changed asm/delay.h to linux/delay.h.
+ * 1.13	RMK	29/06/1998	Fixed problem with transmission of packets.
+ *				Chip seems to have a bug in, whereby if the
+ *				packet starts two bytes from the end of the
+ *				buffer, it corrupts the receiver chain, and
+ *				never updates the transmit status correctly.
+ * 1.14	RMK	07/01/1998	Added initial code for ETHERB addressing.
+ * 1.15	RMK	30/04/1999	More fixes to the transmit routine for buggy
+ *				hardware.
+ * 1.16	RMK	10/02/2000	Updated for 2.3.43
+ * 1.17	RMK	13/05/2000	Updated for 2.3.99-pre8
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/system.h>
+#include <asm/ecard.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
+
+#include "ether3.h"
+
+static unsigned int net_debug = NET_DEBUG;
+
+static void	ether3_setmulticastlist(struct net_device *dev);
+static int	ether3_rx(struct net_device *dev, unsigned int maxcnt);
+static void	ether3_tx(struct net_device *dev);
+static int	ether3_open (struct net_device *dev);
+static int	ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
+static irqreturn_t ether3_interrupt (int irq, void *dev_id, struct pt_regs *regs);
+static int	ether3_close (struct net_device *dev);
+static struct net_device_stats *ether3_getstats (struct net_device *dev);
+static void	ether3_setmulticastlist (struct net_device *dev);
+static void	ether3_timeout(struct net_device *dev);
+
+#define BUS_16		2
+#define BUS_8		1
+#define BUS_UNKNOWN	0
+
+/* --------------------------------------------------------------------------- */
+
+typedef enum {
+	buffer_write,
+	buffer_read
+} buffer_rw_t;
+
+/*
+ * ether3 read/write.  Slow things down a bit...
+ * The SEEQ8005 doesn't like us writing to its registers
+ * too quickly.
+ */
+static inline void ether3_outb(int v, const void __iomem *r)
+{
+	writeb(v, r);
+	udelay(1);
+}
+
+static inline void ether3_outw(int v, const void __iomem *r)
+{
+	writew(v, r);
+	udelay(1);
+}
+#define ether3_inb(r)		({ unsigned int __v = readb((r)); udelay(1); __v; })
+#define ether3_inw(r)		({ unsigned int __v = readw((r)); udelay(1); __v; })
+
+static int
+ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
+{
+	int timeout = 1000;
+
+	ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+	ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
+
+	while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
+		if (!timeout--) {
+			printk("%s: setbuffer broken\n", dev->name);
+			priv(dev)->broken = 1;
+			return 1;
+		}
+		udelay(1);
+	}
+
+	if (read == buffer_read) {
+		ether3_outw(start, REG_DMAADDR);
+		ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
+	} else {
+		ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
+		ether3_outw(start, REG_DMAADDR);
+	}
+	return 0;
+}
+
+/*
+ * write data to the buffer memory
+ */
+#define ether3_writebuffer(dev,data,length)			\
+	writesw(REG_BUFWIN, (data), (length) >> 1)
+
+#define ether3_writeword(dev,data)				\
+	writew((data), REG_BUFWIN)
+
+#define ether3_writelong(dev,data)	{			\
+	void __iomem *reg_bufwin = REG_BUFWIN;			\
+	writew((data), reg_bufwin);				\
+	writew((data) >> 16, reg_bufwin);			\
+}
+
+/*
+ * read data from the buffer memory
+ */
+#define ether3_readbuffer(dev,data,length)			\
+	readsw(REG_BUFWIN, (data), (length) >> 1)
+
+#define ether3_readword(dev)					\
+	readw(REG_BUFWIN)
+
+#define ether3_readlong(dev)	 				\
+	readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
+
+/*
+ * Switch LED off...
+ */
+static void ether3_ledoff(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
+}
+
+/*
+ * switch LED on...
+ */
+static inline void ether3_ledon(struct net_device *dev)
+{
+	del_timer(&priv(dev)->timer);
+	priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
+	priv(dev)->timer.data = (unsigned long)dev;
+	priv(dev)->timer.function = ether3_ledoff;
+	add_timer(&priv(dev)->timer);
+	if (priv(dev)->regs.config2 & CFG2_CTRLO)
+		ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
+}
+
+/*
+ * Read the ethernet address string from the on board rom.
+ * This is an ascii string!!!
+ */
+static int __init
+ether3_addr(char *addr, struct expansion_card *ec)
+{
+	struct in_chunk_dir cd;
+	char *s;
+	
+	if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
+		int i;
+		for (i = 0; i<6; i++) {
+			addr[i] = simple_strtoul(s + 1, &s, 0x10);
+			if (*s != (i==5?')' : ':' ))
+				break;
+		}
+		if (i == 6)
+			return 0;
+	}
+	/* I wonder if we should even let the user continue in this case
+	 *   - no, it would be better to disable the device
+	 */
+	printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
+	return -ENODEV;
+}
+
+/* --------------------------------------------------------------------------- */
+
+static int __init
+ether3_ramtest(struct net_device *dev, unsigned char byte)
+{
+	unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
+	int i,ret = 0;
+	int max_errors = 4;
+	int bad = -1;
+
+	if (!buffer)
+		return 1;
+
+	memset(buffer, byte, RX_END);
+	ether3_setbuffer(dev, buffer_write, 0);
+	ether3_writebuffer(dev, buffer, TX_END);
+	ether3_setbuffer(dev, buffer_write, RX_START);
+	ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
+	memset(buffer, byte ^ 0xff, RX_END);
+	ether3_setbuffer(dev, buffer_read, 0);
+	ether3_readbuffer(dev, buffer, TX_END);
+	ether3_setbuffer(dev, buffer_read, RX_START);
+	ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
+
+	for (i = 0; i < RX_END; i++) {
+		if (buffer[i] != byte) {
+			if (max_errors > 0 && bad != buffer[i]) {
+				printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
+				       dev->name, buffer[i], byte, i);
+				ret = 2;
+				max_errors--;
+				bad = i;
+			}
+		} else {
+			if (bad != -1) {
+				if (bad != i - 1)
+					printk(" - 0x%04X\n", i - 1);
+				printk("\n");
+				bad = -1;
+			}
+		}
+	}
+	if (bad != -1)
+		printk(" - 0xffff\n");
+	kfree(buffer);
+
+	return ret;
+}
+
+/* ------------------------------------------------------------------------------- */
+
+static int __init ether3_init_2(struct net_device *dev)
+{
+	int i;
+
+	priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
+	priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
+	priv(dev)->regs.command = 0;
+
+	/*
+	 * Set up our hardware address
+	 */
+	ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
+	for (i = 0; i < 6; i++)
+		ether3_outb(dev->dev_addr[i], REG_BUFWIN);
+
+	if (dev->flags & IFF_PROMISC)
+		priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
+	else if (dev->flags & IFF_MULTICAST)
+		priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
+	else
+		priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
+
+	/*
+	 * There is a problem with the NQ8005 in that it occasionally loses the
+	 * last two bytes.  To get round this problem, we receive the CRC as
+	 * well.  That way, if we do lose the last two, then it doesn't matter.
+	 */
+	ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
+	ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
+	ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
+	ether3_outw(0, REG_TRANSMITPTR);
+	ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
+	ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+	ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+	ether3_outw(priv(dev)->regs.command, REG_COMMAND);
+
+	i = ether3_ramtest(dev, 0x5A);
+	if(i)
+		return i;
+	i = ether3_ramtest(dev, 0x1E);
+	if(i)
+		return i;
+
+	ether3_setbuffer(dev, buffer_write, 0);
+	ether3_writelong(dev, 0);
+	return 0;
+}
+
+static void
+ether3_init_for_open(struct net_device *dev)
+{
+	int i;
+
+	memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats));
+
+	/* Reset the chip */
+	ether3_outw(CFG2_RESET, REG_CONFIG2);
+	udelay(4);
+
+	priv(dev)->regs.command = 0;
+	ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
+	while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
+		barrier();
+
+	ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
+	for (i = 0; i < 6; i++)
+		ether3_outb(dev->dev_addr[i], REG_BUFWIN);
+
+	priv(dev)->tx_head	= 0;
+	priv(dev)->tx_tail	= 0;
+	priv(dev)->regs.config2 |= CFG2_CTRLO;
+	priv(dev)->rx_head	= RX_START;
+
+	ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
+	ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
+	ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
+	ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
+	ether3_outw(0, REG_TRANSMITPTR);
+	ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+	ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+
+	ether3_setbuffer(dev, buffer_write, 0);
+	ether3_writelong(dev, 0);
+
+	priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
+	ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
+}
+
+static inline int
+ether3_probe_bus_8(struct net_device *dev, int val)
+{
+	int write_low, write_high, read_low, read_high;
+
+	write_low = val & 255;
+	write_high = val >> 8;
+
+	printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
+
+	ether3_outb(write_low, REG_RECVPTR);
+	ether3_outb(write_high, REG_RECVPTR + 4);
+
+	read_low = ether3_inb(REG_RECVPTR);
+	read_high = ether3_inb(REG_RECVPTR + 4);
+
+	printk(", read8 [%02X:%02X]\n", read_high, read_low);
+
+	return read_low == write_low && read_high == write_high;
+}
+
+static inline int
+ether3_probe_bus_16(struct net_device *dev, int val)
+{
+	int read_val;
+
+	ether3_outw(val, REG_RECVPTR);
+	read_val = ether3_inw(REG_RECVPTR);
+
+	printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
+
+	return read_val == val;
+}
+
+/*
+ * Open/initialize the board.  This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+static int
+ether3_open(struct net_device *dev)
+{
+	if (!is_valid_ether_addr(dev->dev_addr)) {
+		printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
+			dev->name);
+		return -EINVAL;
+	}
+
+	if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
+		return -EAGAIN;
+
+	ether3_init_for_open(dev);
+
+	netif_start_queue(dev);
+
+	return 0;
+}
+
+/*
+ * The inverse routine to ether3_open().
+ */
+static int
+ether3_close(struct net_device *dev)
+{
+	netif_stop_queue(dev);
+
+	disable_irq(dev->irq);
+
+	ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
+	priv(dev)->regs.command = 0;
+	while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
+		barrier();
+	ether3_outb(0x80, REG_CONFIG2 + 4);
+	ether3_outw(0, REG_COMMAND);
+
+	free_irq(dev->irq, dev);
+
+	return 0;
+}
+
+/*
+ * Get the current statistics.	This may be called with the card open or
+ * closed.
+ */
+static struct net_device_stats *ether3_getstats(struct net_device *dev)
+{
+	return &priv(dev)->stats;
+}
+
+/*
+ * Set or clear promiscuous/multicast mode filter for this adaptor.
+ *
+ * We don't attempt any packet filtering.  The card may have a SEEQ 8004
+ * in which does not have the other ethernet address registers present...
+ */
+static void ether3_setmulticastlist(struct net_device *dev)
+{
+	priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
+
+	if (dev->flags & IFF_PROMISC) {
+		/* promiscuous mode */
+		priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
+	} else if (dev->flags & IFF_ALLMULTI) {
+		priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
+	} else
+		priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
+
+	ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+}
+
+static void ether3_timeout(struct net_device *dev)
+{
+	unsigned long flags;
+
+	del_timer(&priv(dev)->timer);
+
+	local_irq_save(flags);
+	printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
+	printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
+		ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
+	printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
+		ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
+	printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
+		priv(dev)->tx_head, priv(dev)->tx_tail);
+	ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
+	printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
+	local_irq_restore(flags);
+
+	priv(dev)->regs.config2 |= CFG2_CTRLO;
+	priv(dev)->stats.tx_errors += 1;
+	ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+	priv(dev)->tx_head = priv(dev)->tx_tail = 0;
+
+	netif_wake_queue(dev);
+}
+
+/*
+ * Transmit a packet
+ */
+static int
+ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
+{
+	unsigned long flags;
+	unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+	unsigned int ptr, next_ptr;
+
+	if (priv(dev)->broken) {
+		dev_kfree_skb(skb);
+		priv(dev)->stats.tx_dropped ++;
+		netif_start_queue(dev);
+		return 0;
+	}
+
+	length = (length + 1) & ~1;
+	if (length != skb->len) {
+		skb = skb_padto(skb, length);
+		if (skb == NULL)
+			goto out;
+	}
+
+	next_ptr = (priv(dev)->tx_head + 1) & 15;
+
+	local_irq_save(flags);
+
+	if (priv(dev)->tx_tail == next_ptr) {
+		local_irq_restore(flags);
+		return 1;	/* unable to queue */
+	}
+
+	dev->trans_start = jiffies;
+	ptr		 = 0x600 * priv(dev)->tx_head;
+	priv(dev)->tx_head = next_ptr;
+	next_ptr	*= 0x600;
+
+#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
+
+	ether3_setbuffer(dev, buffer_write, next_ptr);
+	ether3_writelong(dev, 0);
+	ether3_setbuffer(dev, buffer_write, ptr);
+	ether3_writelong(dev, 0);
+	ether3_writebuffer(dev, skb->data, length);
+	ether3_writeword(dev, htons(next_ptr));
+	ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
+	ether3_setbuffer(dev, buffer_write, ptr);
+	ether3_writeword(dev, htons((ptr + length + 4)));
+	ether3_writeword(dev, TXHDR_FLAGS >> 16);
+	ether3_ledon(dev);
+
+	if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
+		ether3_outw(ptr, REG_TRANSMITPTR);
+		ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
+	}
+
+	next_ptr = (priv(dev)->tx_head + 1) & 15;
+	local_irq_restore(flags);
+
+	dev_kfree_skb(skb);
+
+	if (priv(dev)->tx_tail == next_ptr)
+		netif_stop_queue(dev);
+
+ out:
+	return 0;
+}
+
+static irqreturn_t
+ether3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct net_device *dev = (struct net_device *)dev_id;
+	unsigned int status, handled = IRQ_NONE;
+
+#if NET_DEBUG > 1
+	if(net_debug & DEBUG_INT)
+		printk("eth3irq: %d ", irq);
+#endif
+
+	status = ether3_inw(REG_STATUS);
+
+	if (status & STAT_INTRX) {
+		ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
+		ether3_rx(dev, 12);
+		handled = IRQ_HANDLED;
+	}
+
+	if (status & STAT_INTTX) {
+		ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
+		ether3_tx(dev);
+		handled = IRQ_HANDLED;
+	}
+
+#if NET_DEBUG > 1
+	if(net_debug & DEBUG_INT)
+		printk("done\n");
+#endif
+	return handled;
+}
+
+/*
+ * If we have a good packet(s), get it/them out of the buffers.
+ */
+static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
+{
+	unsigned int next_ptr = priv(dev)->rx_head, received = 0;
+
+	ether3_ledon(dev);
+
+	do {
+		unsigned int this_ptr, status;
+		unsigned char addrs[16];
+
+		/*
+		 * read the first 16 bytes from the buffer.
+		 * This contains the status bytes etc and ethernet addresses,
+		 * and we also check the source ethernet address to see if
+		 * it originated from us.
+		 */
+		{
+			unsigned int temp_ptr;
+			ether3_setbuffer(dev, buffer_read, next_ptr);
+			temp_ptr = ether3_readword(dev);
+			status = ether3_readword(dev);
+			if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
+				(RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
+				break;
+
+			this_ptr = next_ptr + 4;
+			next_ptr = ntohs(temp_ptr);
+		}
+		ether3_setbuffer(dev, buffer_read, this_ptr);
+		ether3_readbuffer(dev, addrs+2, 12);
+
+if (next_ptr < RX_START || next_ptr >= RX_END) {
+ int i;
+ printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
+ printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
+ for (i = 2; i < 14; i++)
+   printk("%02X ", addrs[i]);
+ printk("\n");
+ next_ptr = priv(dev)->rx_head;
+ break;
+}
+		/*
+ 		 * ignore our own packets...
+	 	 */
+		if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
+		    !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
+			maxcnt ++; /* compensate for loopedback packet */
+			ether3_outw(next_ptr >> 8, REG_RECVEND);
+		} else
+		if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
+			unsigned int length = next_ptr - this_ptr;
+			struct sk_buff *skb;
+
+			if (next_ptr <= this_ptr)
+				length += RX_END - RX_START;
+
+			skb = dev_alloc_skb(length + 2);
+			if (skb) {
+				unsigned char *buf;
+
+				skb->dev = dev;
+				skb_reserve(skb, 2);
+				buf = skb_put(skb, length);
+				ether3_readbuffer(dev, buf + 12, length - 12);
+				ether3_outw(next_ptr >> 8, REG_RECVEND);
+				*(unsigned short *)(buf + 0)	= *(unsigned short *)(addrs + 2);
+				*(unsigned long *)(buf + 2)	= *(unsigned long *)(addrs + 4);
+				*(unsigned long *)(buf + 6)	= *(unsigned long *)(addrs + 8);
+				*(unsigned short *)(buf + 10)	= *(unsigned short *)(addrs + 12);
+				skb->protocol = eth_type_trans(skb, dev);
+				netif_rx(skb);
+				received ++;
+			} else
+				goto dropping;
+		} else {
+			struct net_device_stats *stats = &priv(dev)->stats;
+			ether3_outw(next_ptr >> 8, REG_RECVEND);
+			if (status & RXSTAT_OVERSIZE)	  stats->rx_over_errors ++;
+			if (status & RXSTAT_CRCERROR)	  stats->rx_crc_errors ++;
+			if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
+			if (status & RXSTAT_SHORTPACKET)  stats->rx_length_errors ++;
+			stats->rx_errors++;
+		}
+	}
+	while (-- maxcnt);
+
+done:
+	priv(dev)->stats.rx_packets += received;
+	priv(dev)->rx_head = next_ptr;
+	/*
+	 * If rx went off line, then that means that the buffer may be full.  We
+	 * have dropped at least one packet.
+	 */
+	if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
+		priv(dev)->stats.rx_dropped ++;
+    		ether3_outw(next_ptr, REG_RECVPTR);
+		ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
+	}
+
+	return maxcnt;
+
+dropping:{
+	static unsigned long last_warned;
+
+	ether3_outw(next_ptr >> 8, REG_RECVEND);
+	/*
+	 * Don't print this message too many times...
+	 */
+	if (time_after(jiffies, last_warned + 10 * HZ)) {
+		last_warned = jiffies;
+		printk("%s: memory squeeze, dropping packet.\n", dev->name);
+	}
+	priv(dev)->stats.rx_dropped ++;
+	goto done;
+	}
+}
+
+/*
+ * Update stats for the transmitted packet(s)
+ */
+static void ether3_tx(struct net_device *dev)
+{
+	unsigned int tx_tail = priv(dev)->tx_tail;
+	int max_work = 14;
+
+	do {
+	    	unsigned long status;
+
+    		/*
+	    	 * Read the packet header
+    		 */
+	    	ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
+    		status = ether3_readlong(dev);
+
+		/*
+		 * Check to see if this packet has been transmitted
+		 */
+		if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
+		    (TXSTAT_DONE | TXHDR_TRANSMIT))
+			break;
+
+		/*
+		 * Update errors
+		 */
+		if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
+			priv(dev)->stats.tx_packets++;
+		else {
+			priv(dev)->stats.tx_errors ++;
+			if (status & TXSTAT_16COLLISIONS)
+				priv(dev)->stats.collisions += 16;
+			if (status & TXSTAT_BABBLED)
+				priv(dev)->stats.tx_fifo_errors ++;
+		}
+
+		tx_tail = (tx_tail + 1) & 15;
+	} while (--max_work);
+
+	if (priv(dev)->tx_tail != tx_tail) {
+		priv(dev)->tx_tail = tx_tail;
+		netif_wake_queue(dev);
+	}
+}
+
+static void __init ether3_banner(void)
+{
+	static unsigned version_printed = 0;
+
+	if (net_debug && version_printed++ == 0)
+		printk(KERN_INFO "%s", version);
+}
+
+static int __devinit
+ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+	const struct ether3_data *data = id->data;
+	struct net_device *dev;
+	int i, bus_type, ret;
+
+	ether3_banner();
+
+	ret = ecard_request_resources(ec);
+	if (ret)
+		goto out;
+
+	dev = alloc_etherdev(sizeof(struct dev_priv));
+	if (!dev) {
+		ret = -ENOMEM;
+		goto release;
+	}
+
+	SET_MODULE_OWNER(dev);
+	SET_NETDEV_DEV(dev, &ec->dev);
+
+	priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
+				  ecard_resource_len(ec, ECARD_RES_MEMC));
+	if (!priv(dev)->base) {
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	ec->irqaddr = priv(dev)->base + data->base_offset;
+	ec->irqmask = 0xf0;
+
+	priv(dev)->seeq = priv(dev)->base + data->base_offset;
+	dev->irq = ec->irq;
+
+	ether3_addr(dev->dev_addr, ec);
+
+	init_timer(&priv(dev)->timer);
+
+	/* Reset card...
+	 */
+	ether3_outb(0x80, REG_CONFIG2 + 4);
+	bus_type = BUS_UNKNOWN;
+	udelay(4);
+
+	/* Test using Receive Pointer (16-bit register) to find out
+	 * how the ether3 is connected to the bus...
+	 */
+	if (ether3_probe_bus_8(dev, 0x100) &&
+	    ether3_probe_bus_8(dev, 0x201))
+		bus_type = BUS_8;
+
+	if (bus_type == BUS_UNKNOWN &&
+	    ether3_probe_bus_16(dev, 0x101) &&
+	    ether3_probe_bus_16(dev, 0x201))
+		bus_type = BUS_16;
+
+	switch (bus_type) {
+	case BUS_UNKNOWN:
+		printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
+		ret = -ENODEV;
+		goto free;
+
+	case BUS_8:
+		printk(KERN_ERR "%s: %s found, but is an unsupported "
+			"8-bit card\n", dev->name, data->name);
+		ret = -ENODEV;
+		goto free;
+
+	default:
+		break;
+	}
+
+	if (ether3_init_2(dev)) {
+		ret = -ENODEV;
+		goto free;
+	}
+
+	dev->open		= ether3_open;
+	dev->stop		= ether3_close;
+	dev->hard_start_xmit	= ether3_sendpacket;
+	dev->get_stats		= ether3_getstats;
+	dev->set_multicast_list	= ether3_setmulticastlist;
+	dev->tx_timeout		= ether3_timeout;
+	dev->watchdog_timeo	= 5 * HZ / 100;
+
+	ret = register_netdev(dev);
+	if (ret)
+		goto free;
+
+	printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no);
+	for (i = 0; i < 6; i++)
+		printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':');
+
+	ecard_set_drvdata(ec, dev);
+	return 0;
+
+ free:
+	if (priv(dev)->base)
+		iounmap(priv(dev)->base);
+	free_netdev(dev);
+ release:
+	ecard_release_resources(ec);
+ out:
+	return ret;
+}
+
+static void __devexit ether3_remove(struct expansion_card *ec)
+{
+	struct net_device *dev = ecard_get_drvdata(ec);
+
+	ecard_set_drvdata(ec, NULL);
+
+	unregister_netdev(dev);
+	iounmap(priv(dev)->base);
+	free_netdev(dev);
+	ecard_release_resources(ec);
+}
+
+static struct ether3_data ether3 = {
+	.name		= "ether3",
+	.base_offset	= 0,
+};
+
+static struct ether3_data etherb = {
+	.name		= "etherb",
+	.base_offset	= 0x800,
+};
+
+static const struct ecard_id ether3_ids[] = {
+	{ MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
+	{ MANU_ANT,  PROD_ANT_ETHER3, &ether3 },
+	{ MANU_ANT,  PROD_ANT_ETHERB, &etherb },
+	{ 0xffff, 0xffff }
+};
+
+static struct ecard_driver ether3_driver = {
+	.probe		= ether3_probe,
+	.remove		= __devexit_p(ether3_remove),
+	.id_table	= ether3_ids,
+	.drv = {
+		.name	= "ether3",
+	},
+};
+
+static int __init ether3_init(void)
+{
+	return ecard_register_driver(&ether3_driver);
+}
+
+static void __exit ether3_exit(void)
+{
+	ecard_remove_driver(&ether3_driver);
+}
+
+module_init(ether3_init);
+module_exit(ether3_exit);
+
+MODULE_LICENSE("GPL");